Illustration 11.16. Calculate quartile coefficient of skewness from the following: Weight No. of persons c.f. Under 100 1 1 100-109 14 15 110-119 120-129 130-139 140-149 150-159 160-169 170-179 66 81 122 203 145 348 121 409 65 534 31 565 12 577 582 180-189 190-199 200 and above 5 584 586

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